ANINTRODUCTIONTOGIS

Summary

Introduction

Tutorials

The tutorials below illustrate several applications of GIS. These tutorials are based on the use of the free and open source software QGIS which can be downloaded here. Different data sources useful for making maps will also be presented.

I. Working with vectors

  1. Getting started with vectors processing
    This tutorial shows the basics of vector manipulation with QGIS (add vector layer, make a map based on a variable, add new variable to attribute table…)
    Data source: IGN BD TOPO

  2. Combine vector layers
    After having seen the basics of vector manipulation with QGIS, we will now see how the different layers can be combined.
    Data source: IGN BD TOPO

II. Working with rasters

  1. Georeferencing images
    This tutorial shows how to georeference historical aerial images, using already georeferenced recent data as a reference.
    Data source: IGN Remonter le Temps

  2. How to create a NDVI map
    This tutorial shows how to download the Sentinel-2 images provided free of charge by ESA and create a NDVI map from these data.
    Data source: ESA Sentinel-2

III. Combining rasters and vectors

  1. Perform an analysis by combining raster and vector layers
    For this tutorial, we will study the distribution of crops by soil type. For this, we will combine a vector layer (the boundaries of the fields) with a raster layer (the soil map).
    Data source: SoilGrids and CAP field register